add global head and tail for both section menu and external program menu
use options.clear_screen for clear instead of hardcoded value in SelectItemHdr remove redundant code for input in main section menu
The v3.20a development branch has now been merged to the master branch. Sysops upgrading from earlier versions must run 'jsexec update'
use options.clear_screen for clear instead of hardcoded value in SelectItemHdr remove redundant code for input in main section menu